CN201909074U - Direct-operated water pressure overflow valve with damping piston - Google Patents
Direct-operated water pressure overflow valve with damping piston Download PDFInfo
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- CN201909074U CN201909074U CN2010206707386U CN201020670738U CN201909074U CN 201909074 U CN201909074 U CN 201909074U CN 2010206707386 U CN2010206707386 U CN 2010206707386U CN 201020670738 U CN201020670738 U CN 201020670738U CN 201909074 U CN201909074 U CN 201909074U
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Abstract
The utility model relates to a direct-operated water pressure overflow valve with a damping piston, which comprises an end cover, a valve seat, a valve spool, a left spring seat, a guiding sleeve, a spring, a right spring seat and a pressure regulating screw. The valve seat, the valve spool, the left spring seat, the guiding sleeve, the spring, the right spring seat and the pressure regulating screw are sequentially arranged in the valve body, an annular groove and a crossed through hole are disposed in the valve seat, the valve spool is arranged in the axial through hole of the valve seat, a countersunk groove is disposed at the end of the valve spool, a guiding surface is formed by a cylindrical surface at the tail of the valve spool and the axial through hole of the valve seat, a conical valve structure is formed at a valve opening formed by the valve spool and the valve seat, the valve spool is in contacted fit with the left spring seat, the left spring seat is guided by the aid of an inner hole of the guiding sleeve, a flow through pore is arranged in the guiding sleeve, an annular groove is arranged on the right of the guiding sleeve, the spring is positioned between the left spring seat and the right spring seat, and the pressure regulating screw is connected with the valve body in a threaded manner. The direct-operated water pressure overflow valve is applicable to pressure control elements in medium and high-pressure water hydraulic system adopting seawater, fresh water, high water base and the like as working media. Compared with similar valves, the direct-operated water pressure overflow valve is simple in structure, convenient in processing, low in leakage, vibration and noise, fine in cavitation erosion resistance and high in operational stability.
Description
Technical field
The utility model relates to the pressure control valve in a kind of water hydraulic system, be particularly related to a kind of direct-acting type water hydraulic relief valve with damping piston, valve kind is suitable for seawater, fresh water, seawater base etc. as the pressure control valve in the mesohigh water hydraulic system of working medium.
Background technique
Relief valve is a pressure control valve commonly used in the hydraulic system, can be used as level pressure relief valve or safety valve.Multipurpose oil is as working medium in hydraulic system, and when relief valve uses in water (comprising seawater, fresh water or high water base etc.) medium, can produce a series of technical problem.1. because the vapor pressure of water is higher than mineral oil far away, when water during in the valve port flow at high speed, the flow field local compression can be lower than the vapor pressure of water, and then produces cavitation phenomenon, makes the material at valve port place be subjected to cavitation erosion, thereby reduces the functional reliability and the life-span of valve; 2. the viscosity owing to water is low, poor lubricity, and the leakage problem at the friction of spool and valve base chamber and valve port place is serious; 3. the density of water, Young's modulus are big than mineral oil, and " water attack " phenomenon is serious; 4. medium goes out stream and spring force and departs from the radial force that reason such as spool axle center produces and make the spool polarization in that valve port is inhomogeneous.5. the complex structure of water hydraulic relief valve, difficulty of processing increases, the cost of production height.
The Central China University of Science and Technology has developed the straight ejector half relief valve of a kind of hydraulic pressure with the oil gas damping device, add on this relief valve spool hydro-pneumatic spring is arranged, form by air cavity, upper oil cavitie and lower oil cavitie, fluid forms damping force by damping hole during valve core movement, hydraulic oil can improve the lubricating condition of spool again simultaneously, and the motion of spool has leading role.But valve still has the existence of oil, is not the pure water medium, and the vibration of spool is more violent, and noise is very big; And this valve arrangement relative complex, processing cost is higher.
The direct-acting type water hydraulic relief valve rear end that Denmark Danfoss company produces is provided with damping cavity, has improved the working stability of valve to a certain extent.But valve is easy to polarization, and consequent vibration noise and working stability still exist.And the material that this valve adopts is not suitable for seawater, the not strong media of corrosivity such as only suitable fresh water and seawater base.
The model utility content
The utility model provides a kind of direct-acting type water hydraulic relief valve with damping piston, be used to solve the above-mentioned technical barrier that direct-acting overflow valve exists, in the aqueous medium environment, work, improve the working stability of valve, reduce valve port leakage, cavitation erosion, vibration, noise, increase corrosion resistance, simultaneously simplified structure, be easy to processing, save cost.
The technical solution of the utility model is as follows:
A kind of direct-acting type water hydraulic relief valve of the present utility model with damping piston, the valve seat, spool, left spring seat, guide sleeve, spring, right spring seat, the screw press that comprise end cap and in valve body, arrange successively; Radially have circular groove in the valve seat, and axially and radially have the criss-crossing through hole, be used to increase the flow area of water inlet, reduce the flow velocity and the noise of relief valve internal water, improve the reliability and the working life of relief valve work along it; Spool is arranged in the valve seat axial hole, and the spool end is provided with the countersunk head groove, and countersunk head groove and end cap form damping cavity, and the axial hole of spool afterbody cylndrical surface and valve seat forms guide surface, and forms cone valve structure with the formed valve port of valve seat place; Spool touches to cooperate with the left spring seated connection and transmits pressure adjusting spring power, and both surface of contact are sphere, can make spring force act on the spool equably; The left spring seat leads with the endoporus of guide sleeve, has through-flow aperture on the guide sleeve, and its right side has circular groove; Spring is between left and right spring seat; Screw press is threaded with valve body; End cap is connected by 4 bolts with valve body, and water intake adopts board-like the connection or the tubular type connection with other interelement of water outlet and hydraulic system on the valve body.
Wherein, spool has played the effect of damping piston.Have T type slightness hole in the described spool vertically and radially, and communicate with the countersunk head groove of its end.Be processing on the one hand for the ease of this elongated hole, on the other hand, this countersunk head groove and end cap form damping cavity, and the damping cavity internal pressure changes the kinetic damping that increases spool when utilizing valve core movement, improved the working stability of spool, so spool has played the effect of damping piston simultaneously; The tail end of spool design simultaneously has the guide cylinder face, and forms matching gap with the valve seat endoporus, provides guiding to valve core movement, can reduce spool polarization in the course of the work.
Described valve seat and spool contact opening place are the ring-shaped step hole, make valve seat and spool form two-step throttle valve port structure.Promptly be operated in higher following time of pressure state when this relief valve, the valve seat mouthful place that contacts with spool be designed to reprocess through hole behind the countersunk head groove, thereby make valve seat and valve core chamber form the structure of two-step throttle mouth, can lower the harm of its cavitation erosion and leakage.
In addition, described spool tail end external cylindrical surface also can be and mills flat structure, makes the high pressure water of inlet can act on piston base thus.Promptly need not again along its radial and axial T of opening type through hole.When the cone valve closure or openness, play damping function on the one hand, be used for improving the stability of cone valve; Be used on the other hand guaranteeing can not tilting after cone valve is opened, to improve the static characteristic of cone valve.
Soft-hard material pairing that described valve seat and spool adopt, wherein valve seat adopts lower aluminum bronze or the engineering plastics of hardness, and spool adopts the stainless steel material through enhancement process.
Described valve body upper outlet place has circular groove, and the flow area at the place that can effectively increase export reduces exit velocity, improves working life.
A kind of direct-acting type water hydraulic relief valve with damping piston of the present utility model is compared with other the straight structure of moving relief valve, and the utility model is simple in structure, is easy to processing, saves cost.
Description of drawings
Fig. 1 is a kind of direct-acting type water hydraulic relief valve structural drawing with damping piston of the utility model.
Fig. 2 is the embodiment of the utility model valve seat and spool two-step throttle valve port.
Fig. 3 plays the another embodiment structural drawing of damping piston effect for the utility model spool.
Fig. 4 is an A-A sectional drawing among Fig. 3.
Among the figure: 1, end cap, 2, valve seat, 3, spool (damping piston), 4, the left spring seat, 5, guide sleeve, 6, valve body, 7, spring, 8, right spring seat, 9, screw press, P, water intake, O, water outlet.
Embodiment
Below in conjunction with accompanying drawing 1-4, the utility model is further specified by embodiment.
As shown in Figure 1, this relief valve valve seat 2, spool 3, left spring seat 4, guide sleeve 5, spring 7, right spring seat 8, screw press 9 of comprising end cap 1 and in valve body 6, arranging successively; Radially have circular groove in the valve seat 2, and axially and radially have the criss-crossing through hole along it, have T type slightness hole in the spool 3 vertically and radially, communicate with the countersunk head groove of its end, countersunk head groove and end cap 1 form damping cavity, spool 3 is in valve seat 2, and the axial hole of its afterbody cylndrical surface and valve seat 2 forms guide surface, and 2 formed valve port places are cone valve structures with valve seat; Spool 3 transmits pressure adjusting spring power with left spring seat 4 contact matching, and both surface of contact are sphere; Left spring seat 4 leads with the endoporus of guide sleeve 5, has through-flow aperture on the guide sleeve 5, and its right side has circular groove; Screw press 9 is threaded with valve body 6, and relief valve is imported and exported can adopt board-like connection or tubular type linkage structure.
During installation, pack into earlier in the valve body 6 right spring seat 8, spring 7, left spring seat 4, guarantee that spring 7 is between the spring seat of the left and right sides, guide sleeve 5 is located by valve body 6 interior step, and passes left spring seat 4, and spool 3 is inserted valve seats 2 endoporus, then both are packed into together in the valve body 6, by bolt end cap 1 is installed on valve body 6 end faces again, makes valve seat 2 end compressing guide sleeve 5 at last screw press 9 to be screwed into valve body 6 from right-hand member.Have the installation tapped hole on the bottom surface of valve body 6, be convenient to other element of relief valve and hydraulic system is connected.
During work, high pressure water enters into the circular groove and the criss-crossing through hole of valve seat 2 from water intake P, slightness hole by spool 3 flows to end countersunk head groove more afterwards, fluid pressure acts on the spool 3 by the countersunk head groove, when working pressure that hydraulic coupling is set greater than pressure adjusting spring 7, spool 3 is opened, and water flows out through valve port, through-flow aperture by guide sleeve 5 flows to spring chamber again, flows out from water outlet O at last.The pressure of water intake P can be set by the pre compressed magnitude that changes pressure adjusting spring 7.In the adjustment process of spool 3, polarization when the guide surface of valve seat 2 can suppress the spool unlatching, and the guide surface of guide sleeve 5 can release spring off-centre take place, the variation that countersunk head groove on the while spool 3 and elongated hole can reduce pressure, damping function when improving valve core movement, and then improved the working life of valve seat and the working stability of spool.
Accompanying drawing 3-4 is the another embodiment that the utility model spool plays the damping piston effect.Promptly need not again along its radial and axial T of opening type through hole, and the tail end outer cylinder facing cut of spool 3 is flat, make the high pressure water of water inlet directly enter from here and act on piston base.When the cone valve closure or openness, play damping function on the one hand, be used for improving the stability of cone valve; Be used on the other hand guaranteeing can not tilting after cone valve is opened, to improve the static characteristic of cone valve.
Claims (6)
1. direct-acting type water hydraulic relief valve with damping piston, the valve seat (2), spool (3), left spring seat (4), guide sleeve (5), spring (7), right spring seat (8), the screw press (9) that comprise end cap (1) and in valve body (6), arrange successively; Valve seat radially has circular groove in (2), and axially and radially have the criss-crossing through hole along it, spool (3) is arranged in valve seat (2) axial hole, spool (3) end is provided with the countersunk head groove, countersunk head groove and end cap (1) form damping cavity, the axial hole of spool (3) afterbody cylndrical surface and valve seat (2) forms guide surface, and forms cone valve structure with the formed valve port of valve seat (2) place; Spool (3) transmits pressure adjusting spring power with left spring seat (4) contact matching, and both surface of contact are sphere; Left spring seat (4) leads with the endoporus of guide sleeve (5), and guide sleeve has through-flow aperture on (5), and its right side has circular groove; Spring (7) is between left and right spring seat; Screw press (9) is threaded with valve body (6).
2. a kind of direct-acting type water hydraulic relief valve with damping piston as claimed in claim 1 is characterized in that: have T type slightness hole in the spool (3) vertically and radially, and communicate with the countersunk head groove of its end.
3. a kind of direct-acting type water hydraulic relief valve with damping piston as claimed in claim 1 is characterized in that: valve seat (2) is the ring-shaped step hole with spool (3) contact opening place, makes valve seat (2) and spool (3) form two-step throttle valve port structure.
4. a kind of direct-acting type water hydraulic relief valve with damping piston as claimed in claim 1 is characterized in that: spool (3) tail end external cylindrical surface makes the high pressure water of inlet can act on piston base thus for milling flat structure.
5. as each described a kind of direct-acting type water hydraulic relief valve among the claim 1-4 with damping piston, it is characterized in that: end cap (1) is connected by 4 bolts with valve body (6), and valve body (6) is gone up water intake (P) and adopted board-like the connection or the tubular type connection with water outlet (O) and other interelement of hydraulic system.
6. as each described a kind of direct-acting type water hydraulic relief valve among the claim 1-4 with damping piston, it is characterized in that: valve seat (2) and spool (3) adopt soft-hard material pairing, wherein valve seat adopts lower aluminum bronze or the engineering plastics of hardness, and spool adopts the stainless steel material through enhancement process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206707386U CN201909074U (en) | 2010-12-10 | 2010-12-10 | Direct-operated water pressure overflow valve with damping piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206707386U CN201909074U (en) | 2010-12-10 | 2010-12-10 | Direct-operated water pressure overflow valve with damping piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201909074U true CN201909074U (en) | 2011-07-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206707386U Expired - Fee Related CN201909074U (en) | 2010-12-10 | 2010-12-10 | Direct-operated water pressure overflow valve with damping piston |
Country Status (1)
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|---|---|
| CN (1) | CN201909074U (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102042432A (en) * | 2010-12-10 | 2011-05-04 | 北京工业大学 | Direct-acting water pressure overflow valve with damping piston |
| CN102943909A (en) * | 2012-10-19 | 2013-02-27 | 华中科技大学 | Differential type water hydraulic relief valve |
| CN103406734A (en) * | 2013-08-22 | 2013-11-27 | 龙工（上海）精工液压有限公司 | Machining method of valve seat of relief valve |
| CN104114924A (en) * | 2012-02-24 | 2014-10-22 | 曼·胡默尔有限公司 | Valve |
| CN105003696A (en) * | 2015-07-20 | 2015-10-28 | 林建州 | Pressure regulation piston with pressure buffering function |
| CN105299254A (en) * | 2015-12-08 | 2016-02-03 | 大连海事大学 | Overflow valve of oil supply system of transmission device |
| CN106015151A (en) * | 2016-08-11 | 2016-10-12 | 中国海洋大学 | Throttle valve |
| CN106369198A (en) * | 2016-08-31 | 2017-02-01 | 宁波钱湖石油设备有限公司 | Safety valve for reciprocation pump |
| CN106438261A (en) * | 2016-08-31 | 2017-02-22 | 宁波钱湖石油设备有限公司 | Reciprocation pump power device |
| CN106481528A (en) * | 2016-08-31 | 2017-03-08 | 宁波钱湖石油设备有限公司 | A kind of reciprocating pump |
| CN107630850A (en) * | 2017-11-13 | 2018-01-26 | 中鼎恒盛气体设备（芜湖）有限公司 | A kind of pressure regulator valve for membrane compresses oil way system |
| CN110206921A (en) * | 2019-07-04 | 2019-09-06 | 湖南机油泵股份有限公司 | A kind of engine oil pump pressure-limiting valve with damping hole |
-
2010
- 2010-12-10 CN CN2010206707386U patent/CN201909074U/en not_active Expired - Fee Related
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102042432A (en) * | 2010-12-10 | 2011-05-04 | 北京工业大学 | Direct-acting water pressure overflow valve with damping piston |
| CN102042432B (en) * | 2010-12-10 | 2012-05-23 | 北京工业大学 | Direct-acting water pressure overflow valve with damping piston |
| CN104114924B (en) * | 2012-02-24 | 2017-05-03 | 曼·胡默尔有限公司 | Valve |
| CN104114924A (en) * | 2012-02-24 | 2014-10-22 | 曼·胡默尔有限公司 | Valve |
| CN102943909B (en) * | 2012-10-19 | 2014-04-09 | 华中科技大学 | Differential type water hydraulic relief valve |
| CN102943909A (en) * | 2012-10-19 | 2013-02-27 | 华中科技大学 | Differential type water hydraulic relief valve |
| CN103406734A (en) * | 2013-08-22 | 2013-11-27 | 龙工（上海）精工液压有限公司 | Machining method of valve seat of relief valve |
| CN105003696A (en) * | 2015-07-20 | 2015-10-28 | 林建州 | Pressure regulation piston with pressure buffering function |
| CN105299254A (en) * | 2015-12-08 | 2016-02-03 | 大连海事大学 | Overflow valve of oil supply system of transmission device |
| CN105299254B (en) * | 2015-12-08 | 2017-07-11 | 大连海事大学 | A kind of direct-acting overflow valve of transmission device oil supply system |
| CN106015151A (en) * | 2016-08-11 | 2016-10-12 | 中国海洋大学 | Throttle valve |
| CN106369198A (en) * | 2016-08-31 | 2017-02-01 | 宁波钱湖石油设备有限公司 | Safety valve for reciprocation pump |
| CN106438261A (en) * | 2016-08-31 | 2017-02-22 | 宁波钱湖石油设备有限公司 | Reciprocation pump power device |
| CN106481528A (en) * | 2016-08-31 | 2017-03-08 | 宁波钱湖石油设备有限公司 | A kind of reciprocating pump |
| CN107630850A (en) * | 2017-11-13 | 2018-01-26 | 中鼎恒盛气体设备（芜湖）有限公司 | A kind of pressure regulator valve for membrane compresses oil way system |
| CN110206921A (en) * | 2019-07-04 | 2019-09-06 | 湖南机油泵股份有限公司 | A kind of engine oil pump pressure-limiting valve with damping hole |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110727 Termination date: 20121210 |